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Ford Performance Ring and Pinion Gear Kit; 3.55 Gear Ratio (99-04 Mustang GT)Find parts that fit my vehicle

Item 50166G99
AmericanMuscle no longer carries the Ford Performance Ring and Pinion Gear Kit; 3.55 Gear Ratio (99-04 Mustang GT). Please check out 1979-1993 Foxbody Mustang Drivetrain for an updated selection.
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500+ Reviews 2 Answers

    Product Information

    Features, Description, Reviews, Q&A, Specs & Installation

    Features

    • Ford Racing Quality
    • Strong Forged Construction
    • 3.55 Gear Ratio
    • 8.8" Ring Gear Diameter
    • For Street or Track Use
    • Fits 1999-2004 GT, Bullitt, Mach 1 and Cobra Mustangs

    Description

    Improve ET's and low end torque. Are you looking to get more low end grunt off the line and lower ET's at the same time? Then look no further than installing a set of steeper gears in your Pony. Ford Racing Ring and Pinion Gears are perfect for street, road, or race use.

    Superior Quality. These Ford Racing 3.55 Mustang ring and pinion gears feature a super strong forged construction, CNC cut & lapped gear teeth, and a black oxide finish to resist corrosion.

    Recommended Upgrade. Changing the rear axle gear ratio will throw off the calibration of your Mustangs speedometer, but a Ford Racing Speedometer Recalibration Tool is an inexpensive way to fix this issue.

    Application. This Ford Racing Ring and Pinion Gear set will fit all 1999 to 2004 V8 Mustangs including the GT, Bullitt, Mach 1 and Cobra models. A master bearing kit is recommended by most installers, especially on high mileage vehicles, see drop down option above.

    Technical Note. Installation costs will vary, but a good rule of thumb is between $250 and $300. Be sure to work with a reliable shop that you trust for installations. You can also save money on your installation labor by having your Trac-Lok rebuilt at the same time as your gears are installed, see drop down option above.

    CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

    Installation & What's in the Box

    Installation Info

    What's in the Box

    • (1) Ring gear
    • (1) Pinion gear

    Tech Specs

    Approximate RPM for 1999-2004 GT


    Manual
    Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
    1 3700 5180 6660      
    2 2190 3065 3941 4817 5693 6569
    3 1445 2023 2601 3179 3757 4335
    4 1095 1533 1971 2408 2846 3284
    5 744 1042 1340 1638 1936 2233


    Automatic
    Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
    1 3109 4353 5596 6840    
    2 1697 2376 3054 3733 4412 5091
    3 1095 1533 1971 2408 2846 3284
    4 766 1073 1379 1686 1992 2299
    4.9

    Customer Reviews (500+)

    Questions & Answers (2)

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